Centrifugal pump.



,Jr A. YEATMAN. CENTRIFUGAL PUMP.

ArPLIoA'rIoN FILED Dnoxr, 1911.

ATTORNEY S UNITED STATES PATENT OFFICE;

JOHN A. YEATMAN, or OAKLAND, CALIFORNIA AssIGNo'a To UNITED :mon Wenns,

OF OAKLAND, CALIFORNIA," .A CORPORATION F CALIFORNIAl .ennrniruean rUMr.

To all whom t may concern:

Be it known that I, JOHN A. YEATMAN, a citizen of the United States, and a resident of the city of Oakland, county of Alameda,

and State of California, have invented cer-l tain new and useful Improvements in Cen-V trifugal Pumps, of which-the following is a specification.

balance for centrifugal pumps.O

' AThe invention relates to centrifugal pumps.

andv'especially to means for counterbalancing the endthrust'of suchpumps.

The' object of the invention is to provide an automatic hydraulic 4end-thrust counter- Another 'object of the invention is to pro- "vide an automatic hydraulic end-thrust counterbalance in which the pressure in Athe counterloalance` chamber may be controlledv and adjusted.

A further pump casing in which to wear is" formed separate 'and maybe -removed and-replaced by a new part when worn.

It `is well understood by Vthose familiar i with centrifugal pumps that lthe discharge resssure between `the runner and the case 1s never equal to the 'total discharge pressure in the involute chamber .or the discharge pipe and that these variations will trifugal counterba anclng means,

Y pressure caused `charge or that part cause an unequal' pressure on the vopposite pressure is greater and has vexhausted into the runner lorY the suction, inlet in v'v'hich'the pressure 1s considerably lower than that of the atmosphere.

There has therefore always been asuction.

eigerted on said chambelgfwhich withdrew the water therefrom, and consequently. reduced the pressure within the counterbal- ,ance chamber. `The pressure exerted on Speieatioxi o f Letters Patent.

Y bject of the. invention is'toL ,provide an improved construction of ythe the part subjected' lthat companying and This yhe used .usual involute chamber 3, vand discharge outlet 5. Within the case' 2 Patented Apr. 16, 1912.`

Application iled Decemberi', 1911. Serial No. 664,439.

the water'tending to force it out of the pressure chamber was the pressure of the water .in the chamber plus the vacuum pressure the runner or suction inlet. It is `evident that if this suction effect could be eliminated,

a greater pressure per square inch could be obtainedwithin the pressure chamber and hence a smaller chamber would be necessary to counter-balance the thrust and a'more -eicientvpump would be obtained, since the amount .of water necessary to operate the counter-balancev would be/greatly lessened.

vIn the present-construction', I obviate these 'objectionable features of the prior art by arranging' the counter-balance chamber in= communication with the usual source of pressure and with the atmosphere, therebyobviating the eil'ects of 'the suction. or vacuum.. s s d The invention possesses other advantageous features, which, with the foregoing,

will be s et'forth at length in the following descri tion. where I 'shall outline in full selected for illustration in the drawings acforming part'of the present specification. The novelty of 'the' invention will` beA included' in the claims succeeding said description.4 From this it will be apparent that I do not restrict myself j tothe Vshowing made by such drawings and descriptionsas I may adopt many variations within thesoope of my invention as expressed i'n said claims.

Referring .to the drawings :-Il`igu re 1 .is a vertical section of a vertical ugal pump showing the counter-balance Ychamber of my 1nvention.` Fig. 2 vis a fragorm of the invention which I haveshaft centrifmentary section of the lower part' ofthe.

pump showing a modification, of the means for adjusting the position of equilibrium of the runner relative tothe case. y

My invention is particularly vadapted 'to ,'n connection with vertical shaft centrifugal pumps'and I have illustrated in theidrawings a single' stage or simple vertical shaft pump, but it is to be understood that the inventionis equally' applicable to multi-stage or compound pumps.

The pump consists of arcase 2 having the suction inlets et and attached to the vertical` drive shaft 6 is a runner or impeller'f? arranged so that-it 'the pump is in operation. A collar 8, ses

cured to lthe lshaft 6 supports the shaft and runner when the pump is not in operation and is so placed that it is lifted out of c ontact with the upper part of the pump framing 9, when the pump is in operation.

he runner 7 is provided onl opposite sides with the flanges 12-13 which form running joints to hold the impeller alined. The iiange 12 on the upper sides of the ruliner forms a running joint with the' case Q'and the flange 13 on the lower side forms a running joint with an annular ringr11 secured to the case. This annular ring vis preferably formed separable from the pump casing so that it may be readily removed when worn and a new ring inserted in its place. This arrangement obviates the neA cessity of replacing the entire lower plate 15 of the case when the joint becomes excessively worn, a kfeature which is of material importance in pump operation.

' attachedto the flange,

' int-o the plate 18, so

v lock-'nut 21 so that it Closing the lower end of the runner is av plate 16 either formed integrally with the ange 13 or'formed separately and securely so that it moves vertically in unison with the runner. The flange 13, the ring 14 and the lower part of the case are so formedthat a chamber 17 is .formed between the plate 16 and the lower plate 18 of the casing.` Thisk .plate 18 is formed with anaperture therein, which acts as an outlet for the waterin the chamber 17. This outlet is preferably formed of a hollow plug or nipple 19, screw-threaded that its position may and provided with a may be ixed in ad- Formed centrally on the lower side of the plate 16 is a cylindrical boss or piston 22 which fits into the nipple '19 and is movableIl vertically with respectthereto. This vertical movement of the piston 22 controls the outlet to the chamber 17. In Fig. 2 I have shown a slight moditication in which the nipple 19 projects upward in the chamber 17 and is provided with one or more holes 23 which are covered and uncovered bythe vertical movement of the piston.l In this construction the piston is seated inthe nipple at withdrawn therefrom as it movesl upward.

Vtater under pressure is applied to the chamber 17 from within the case through the running joint between the ring 14 and the iiange 13 and the area of the chamber is suchfthat the pressure is suiiicient to support lthe runner and its driving means. VVhenevei.m the pressure in chamber 17 exceeds thepressure on the opposite side of be adjusted vertically,

j usted positions.

the runner, the latter will move with the simply adjusting all'times and is notv inlet, said flange being closed on the end,

water in the chamber to' discharge through the nipple and-consequently'reducing the pressure. y

The circumferential length of the running joint between the ring 14 'and the Hengel?) being much greater than the length of the joint between the piston QZ and the nipple 19, the water is enabled to enter the chamber faster than i'tmay discharge when the 'piston engages the nipple, consequent-ly pressure is produced in the chamber 17. As the piston is moved out of the nipple, however, the water is discharged from the chamber with greater rapidit Y and the pressure therein is reduced. This operation is carried on 'automatically with the result of holding the runner in perfect balance. This arrangement also produces a downward path for the water so that sand does not become lodged in the chamber 1 7 and interfere with-the operation of the balance. Under some circumstances, however, a variation in hydraulic pressure and of driving force, it has been found the point of equilibrium of the runner relative to the case. This is accomplished by the position of the nipple 19 A pipe or conductor 24 attached to the nipple 19 extends into the water of the well, or other water supply so that when the pumpis being` primed and started, air will not be drawn into the .casing and prevent priming. i

1. In a centrifugal pump, the combination of a case, a runner mounted upon a shaft and revoluble withinthe case, a suction inietpassage, a closed end cylindrical portion extending from the runner on the side opposite the suction inlet, a cylindrical chamber in the case into which sa d cylindrical portion extends andis revoluble, a central outlet passage lthrough the case opening into said chamber and a central piston on saidcylindrical portion for controlling said passage; 2. In a centrifugal pump, the combination of a case, lshaft and revoluble within the case, a suction inlet passage, a flange projecting from the runner on the side opposite the suction a lchamber within the case into which said flange extends and is'revoluble, an outlet passage through the case opening lnto said chamber, a hollow plug :.djustably secured in said passage, and a piston attached to the runner controlling the outlet through said plug. n l

3. In a centrifugal pump, the combinaH tion of a case, an inclosed runner mounted upon a shaft Iand revoluble within the case,

a suction inlet passage concentric with the r shaft upon one 'side'of the case, an fannular iange projecting from the runner lnto saiddesirable to change eol a runner mounted upon a inlet forming a running joint therein, a correspondingllange projecting from the opposite side of the runner, a chamber Within the ease into which said flange extends and is revoluble, said case being provided with a passage opening into said chamber, and a piston attached to the runner for controlling said passage. l

4. In a centrifugal pump, the combination of a case, a runner mounted upon a shaft. and revoluble within the case, a suction inlet passage, a flange projecting from the runner onthe side opposite the suction inlet, a. plate closing the end of said'ange, a cylindrical chamber into which said flange of therunner extends and is revoluble, said case being provided with a passage opening into said chamber, and a piston attached to said plate controlling said passage.

ln a centrifugal pump, the combination of a case, ajrunner mounted upon a shaft and revoluble Within the case, a suction inlet passage, a closed end cylindrical portion extending from the runner on the side opposite the suction inlet, a cylindrical chamber in the case into which said cylindrical portion extends and is revoluble,` a hollow plug in said case forming an outlet to said chamber, said nipple being provided with a laterally extending aperture, and

l means attached to said cylindrical portion,

engaging said plug for controlling the outlet ,through said aperture.

G. In a vertical shaft centrifugal pump, the combination of a case, a` runner mounted on a shaft and revoluble within said case, a closed cylindrical 4portion extending downward from the lower side of the runner, a chamber in s aid case into which said cylindrical portion extends and y is revof luble, said case being provided with a downwardly projecting passage, alined with the shaft, opening into chamber, and means on thelower side of said cylindrical portion for controlling said passage.

7. In a centrifugal pump, the combina- .tion of a case, a runner mounted upon a shaft and revoluble Within said case, an annular space between the runner and 'the end of the casing adjacent the discharge passage, the latter and said chamber being in constant communication, a hollow plug in the end of the casing forming an outlet passage to said chamber, said plug being movable relative to the end of the runner so that the outlet passage may be controlled to vary the point of equilibrium of the runner.

8. The combination in a-centriugal pump of an automatic balancing device consisting of annular flanges projecting from the opposite sides of the runner, one of said flanges forming a running joint Within the suction passage and the other extending into and forming a similar joint in a chamberformed on the opposite side of the case, an inlet passage connecting the interior of the pump chamber with `said chamber, an outlet through said chamber, and a piston movable with said runner to Acontrol said outlet.

9. Ina centrifugal pump, the combination of a case, a runner mounted upon a shaft and revoluble'within the case, a suction inlet passage, a closed'end cylindrical portion extending from the runner on the side opposite the suction inlet, a cylindrical chamber in the case into which said cylindrical-portion extends and is revoluble, a central outlet passage ,through the lcase opening into said chamber, a central piston on said cylindrical portion for controlling said passage and a conductor connecting said passage with a.vvater supply.

In testimony whereof, I have hereunto set my hand at San Francisco, California, this 1st day of December 1911.

V JOHN A. Yin/verrait.A In presence of- H. G. PnosT, R. HEFFERMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

in` Letters Patent No. 1,023,776

ion

rect

theA said Letters Patent should beread Washington, D. C.

Signed and sealed this 21st day4 of July, A. D., 1914.

R. F. WHITEHEAD,

Act/ng Commissioner of Patents.

l[ t is hereby certified that in Letters Patent No, 1,023,776, granted April 16, 1912, upon theapplication of John A. Yeatman, of Oakland, California, foran improvement in Centrifugal Pumps, an error appears in the printed Vspecification requiring correction as follows: Page 3, strike out li-nes 59-71, comprising claim 8; and that this correction therein that the same inlet forming a running joint therein, a correspondingllange projecting from the opposite side of the runner, a chamber Within the ease into which said flange extends and is revoluble, said case being provided with a passage opening into said chamber, and a piston attached to the runner for controlling said passage. l

4. In a centrifugal pump, the combination of a case, a runner mounted upon a shaft. and revoluble within the case, a suction inlet passage, a flange projecting from the runner onthe side opposite the suction inlet, a. plate closing the end of said'ange, a cylindrical chamber into which said flange of therunner extends and is revoluble, said case being provided with a passage opening into said chamber, and a piston attached to said plate controlling said passage.

ln a centrifugal pump, the combination of a case, ajrunner mounted upon a shaft and revoluble Within the case, a suction inlet passage, a closed end cylindrical portion extending from the runner on the side opposite the suction inlet, a cylindrical chamber in the case into which said cylindrical portion extends and is revoluble,` a hollow plug in said case forming an outlet to said chamber, said nipple being provided with a laterally extending aperture, and

l means attached to said cylindrical portion,

engaging said plug for controlling the outlet ,through said aperture.

G. In a vertical shaft centrifugal pump, the combination of a case, a` runner mounted on a shaft and revoluble within said case, a closed cylindrical 4portion extending downward from the lower side of the runner, a chamber in s aid case into which said cylindrical portion extends and y is revof luble, said case being provided with a downwardly projecting passage, alined with the shaft, opening into chamber, and means on thelower side of said cylindrical portion for controlling said passage.

7. In a centrifugal pump, the combina- .tion of a case, a runner mounted upon a shaft and revoluble Within said case, an annular space between the runner and 'the end of the casing adjacent the discharge passage, the latter and said chamber being in constant communication, a hollow plug in the end of the casing forming an outlet passage to said chamber, said plug being movable relative to the end of the runner so that the outlet passage may be controlled to vary the point of equilibrium of the runner.

8. The combination in a-centriugal pump of an automatic balancing device consisting of annular flanges projecting from the opposite sides of the runner, one of said flanges forming a running joint Within the suction passage and the other extending into and forming a similar joint in a chamberformed on the opposite side of the case, an inlet passage connecting the interior of the pump chamber with `said chamber, an outlet through said chamber, and a piston movable with said runner to Acontrol said outlet.

9. Ina centrifugal pump, the combination of a case, a runner mounted upon a shaft and revoluble'within the case, a suction inlet passage, a closed'end cylindrical portion extending from the runner on the side opposite the suction inlet, a cylindrical chamber in the case into which said cylindrical-portion extends and is revoluble, a central outlet passage ,through the lcase opening into said chamber, a central piston on said cylindrical portion for controlling said passage and a conductor connecting said passage with a.vvater supply.

In testimony whereof, I have hereunto set my hand at San Francisco, California, this 1st day of December 1911.

V JOHN A. Yin/verrait.A In presence of- H. G. PnosT, R. HEFFERMAN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

in` Letters Patent No. 1,023,776

ion

rect

theA said Letters Patent should beread Washington, D. C.

Signed and sealed this 21st day4 of July, A. D., 1914.

R. F. WHITEHEAD,

Act/ng Commissioner of Patents.

l[ t is hereby certified that in Letters Patent No, 1,023,776, granted April 16, 1912, upon theapplication of John A. Yeatman, of Oakland, California, foran improvement in Centrifugal Pumps, an error appears in the printed Vspecification requiring correction as follows: Page 3, strike out li-nes 59-71, comprising claim 8; and that this correction therein that the same :rection in Letters Patent No. 1,023,776.

[it is hereby certified that in Letters Patent No, 1,023,776, granted April 161 1912, upon the application of John A. Yeatmah, of Oakland, California, for an improvement in L"Jnntrifugal lumps,z1.n error appears in the printed specification requiring correction as follows: Page 3, strike 'out lines 59-7, comprising claim 8; and that the said Letters Patent shoulcl he read with thiy correction therein that the same may conform to the record of the case in the Patent ce.

Signed and sealed this 21st day of July, A. D., 1914.

R. F. VHITEHEA )l [SEAL] Acting Commissioner 0f Patents. 

